Sure, the case you're looking for is Dowling v. United States. I'd give you a Wiki link, but..
The general gist of the case is that a man made a business out of pressing and selling Elvis records without distribution rights. Because of this, he was indicted for (among other things) distribution of stolen property and conspiracy of the same.
The supreme court struck down all of the stealing charges, with an opinion that (and I'm paraphrasing from memory here): "Copyright implies a more complex set of property interests than simple theft".
The phonorecords in question were not "stolen, converted or taken by fraud" for purposes of [section] 2314. The section's language clearly contemplates a physical identity between the items unlawfully obtained and those eventually transported, and hence some prior physical taking of the subject goods. Since the statutorily defined property rights of a copyright holder have a character distinct from the possessory interest of the owner of simple "goods, wares, [or] merchandise," interference with copyright does not easily equate with theft, conversion, or fraud. The infringer of a copyright does not assume physical control over the copyright nor wholly deprive its owner of its use. Infringement implicates a more complex set of property interests than does run-of-the-mill theft, conversion, or fraud.
The general gist of the case is that a man made a business out of pressing and selling Elvis records without distribution rights. Because of this, he was indicted for (among other things) distribution of stolen property and conspiracy of the same.
The supreme court struck down all of the stealing charges, with an opinion that (and I'm paraphrasing from memory here): "Copyright implies a more complex set of property interests than simple theft".